High-Performance Liquid Chromatographic Method for the Determination of Cyromazine and Melamine Residues in Milk and Pork

文献类型： 外文期刊

第一作者： Wei, Ruicheng

作者： Wei, Ruicheng;Wang, Ran;Chen, Ming;Liu, Tiezheng;Zeng, Qingfei;Zeng, Qingfei

作者机构：

关键词： calibration;compounds;retention

期刊名称：JOURNAL OF CHROMATOGRAPHIC SCIENCE （ 影响因子：1.618； 五年影响因子：1.682 ）

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收录情况： SCI

摘要： A high-performance liquid chromatography method is described in this paper. The method uses NH_2 column and 97% acetonitrile eluate to determine the insecticide cyromazine and metabolite melamine residues in milk and pork. Samples were treated with NaOH and extracted with acetonitrile containing 20% NH_4OH.Target analytes of samples were cleaned up and concentrated by C_(18) column solid-phase extraction. A separation for cyromazine and melamine was achieved, and respective retention times were 8 and 12 min. The calibration curves for cyromazine and melamine were linear in a concentration range of 0.01–1.0 μg/mL, with correlation coefficients of 0.9999 and 0.9997, respectively. The limit of detection of both compounds was 0.2 ng, and the limit of quantitation was 0.02 mg/kg. Recoveries of cyromazine and melamine at fortified levels of 0.02, 0.05, and 0.1 mg/kg ranged from 84.5–90.8%, and 83.6–91.3%, respectively, with coefficient of variation of 3.1–7.8%.

分类号： O65

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